The nutrient export by flowering stems in 3 year-old rose bushes was determined for three varieties of great commercial importance in Tenerife. The cultivar VISA exports annually per m$ 20.16 grs N. 6.55 grs P$O$ and 23.45 grs K$O, white ILONA exports 13.57 grs N, 4,08 grs P$O$ and 17,11 grs K$O$ and MERCEDES 25,60 grs N, 5.04 grs P$O$ and 19,57 grs K$O$. The nutrient amounts extracted from the greenhouse in pruning and pinching out operations are included in these figures. | Peer reviewed

Calcium, (Ca) trace element (Mn, Cu, Fe, Zn) and moisture contents of different varieties of cereals and pulses are reported. The nutrient densities (mg/100 calories) of Ca and the 4 trace elements also are calculated. Cereal concentration of Ca, Mn, Fe, Cu, and Zn were approximately 45-287, 0.6-3, 9-4, 0.3-0.7, and 1.6-3 mg/100 g dry matter, while the respective nutrient densities ranged from about 13-82, 0.2-0.9, 1.2-2.6, 0.1-0.2, and 0.5-0.9 mg/100 calories. Legume concentration of Ca, Mn, Fe, Cu, and Zn equalled approximately 110-281, 0.9-1.8, 6,8-13, 0.6-1.8, and 2-4 mg/100 g dry matter, respectively, while the nutrient densities ranged from about 32-78, 0.2-0.5, 2.0-3.8, 0.15-0.24, and 0.5-1.2 mg/100 calories. While these cereals and legumes are relatively good sources of these trace elements, the availability of the elements is affected by the presence of high phytic acid and fiber levels. (wz)

Abstract only | The effect of NaCl and nitrogen on the soil solution EC and pH; and on the growth, yield, and nutrient concentration of IR52 and IR26 rice varieties were studied in a pot experiment in the screenhouse of the Department of Soil Science, UPLB, College, Laguna, from December 17, 1982 to April 23, 1983. The results show that the soil solution EC increased, whereas pH decreased with increasing salinity. The different salt levels also significantly delayed flowering and harvesting, depressed growth and yields, and generally increased the concentrations of nitrogen, phosphorus, sodium and chlorine, but decreased potassium concentration in the straw of both varieties. Varietal response to applied nitrogen, however, differed. In terms of their straw yield, IR52 responded Here to the application of 90 kg N/ha whereas IR26, to 135 kg N/ha application. Furthermore, fertilization with 90 and 135 kg N/ha increased the concentrations of nitrogen in the root and of potassium and sodium in the straw of IR52. The same nitrogen levels increased the concentrations of phosphorus in the grain and of potassium in the straw of IR26, The highest nitrogen rate (135 kg N/ha) increased chlorine concentration in the grain of IR52, but decreased that of IR26. | Southeast Asian Regional Center for Graduate Study and Research in Agriculture (SEARCA) and Central Philippine University | Includes bibliographical references | Master of Science (Soil Science)

Abstract only | The effect of NaCl and nitrogen on the soil solution EC and pH; and on the growth, yield, and nutrient concentration of IR52 and IR26 rice varieties were studied in a pot experiment in the screenhouse of the Department of Soil Science, UPLB, College, Laguna, from December 17, 1982 to April 23, 1983. The results show that the soil solution EC increased, whereas pH decreased with increasing salinity. The different salt levels also significantly delayed flowering and harvesting, depressed growth and yields, and generally increased the concentrations of nitrogen, phosphorus, sodium and chlorine, but decreased potassium concentration in the straw of both varieties. Varietal response to applied nitrogen, however, differed. In terms of their straw yield, IR52 responded Here to the application of 90 kg N/ha whereas IR26, to 135 kg N/ha application. Furthermore, fertilization with 90 and 135 kg N/ha increased the concentrations of nitrogen in the root and of potassium and sodium in the straw of IR52. The same nitrogen levels increased the concentrations of phosphorus in the grain and of potassium in the straw of IR26, The highest nitrogen rate (135 kg N/ha) increased chlorine concentration in the grain of IR52, but decreased that of IR26. | Southeast Asian Regional Center for Graduate Study and Research in Agriculture (SEARCA) and Central Philippine University | Includes bibliographical references | Master of Science (Soil Science)

This paper gives some results of investigating and identifying species of the pathogenic fungus Fusarium spp. of potato, spread at the territory of SR Slovenia (SFRY) and susceptibility or resistance of some potato varieties. The fungi were isolated by standard laboratory methods from 25 naturally infected potato samples taken from several parts of SR Slovenia. The potato dextrose agar was used as a nutrient. The following potato varieties were used for the experiment:Desiree', Saskia, Resy, Bintje, Jaerla and Sirtema. The following species of the Fusarium genus were isolated:F. solani, F. sombucinum, F. avenaceum, F. graminearum and F. lateritium. Under laboratory conditions, the most pathogenic species in potato varieties Jaerla and Sirtema was F. avenaceum, and in Bintje, F. graminearum shows the highest pathogenicity index. Bintje was the most susceptible variety. Under normal storing conditions the most pathogenous species in all 3 varieties was F. avenaceum, followed by F. graminearum, F. sombucinum and F. solani. Pathogenicity of the F. lateritium species is higher than that of F. sombucinum in all varieties except Bintje, in which the average index was higher for F. sombucinum species. The 5 investigated varieties were physiologically resistant to F. sombucinum species and only Bintje was more resistant to F. lateritium. Physiologically the most susceptible potato variety was Bintje, then Resy, Jaerla, Desiree', Sirtema, while Saskia was the most resistant. The most resistant species was F. avenaceum and the least resistant F. solani. The most frequently found was F. sombucinum (41.7%). It is concluded that the dry rot of potato is becoming a more and more important disease in SR Slovenia with the expansion of mechanized production, storing and finishing in warehouses and with the import of seed potato (pathogenic fungus with the seed too).

This paper gives some results of investigating and identifying species of the pathogenic fungus Fusarium spp. of potato, spread at the territory of SR Slovenia (SFRY) and susceptibility or resistance of some potato varieties. The fungi were isolated by standard laboratory methods from 25 naturally infected potato samples taken from several parts of SR Slovenia. The potato dextrose agar was used as a nutrient. The following potato varieties were used for the experiment:Desiree', Saskia, Resy, Bintje, Jaerla and Sirtema. The following species of the Fusarium genus were isolated:F. solani, F. sombucinum, F. avenaceum, F. graminearum and F. lateritium. Under laboratory conditions, the most pathogenic species in potato varieties Jaerla and Sirtema was F. avenaceum, and in Bintje, F. graminearum shows the highest pathogenicity index. Bintje was the most susceptible variety. Under normal storing conditions the most pathogenous species in all 3 varieties was F. avenaceum, followed by F. graminearum, F. sombucinum and F. solani. Pathogenicity of the F. lateritium species is higher than that of F. sombucinum in all varieties except Bintje, in which the average index was higher for F. sombucinum species. The 5 investigated varieties were physiologically resistant to F. sombucinum species and only Bintje was more resistant to F. lateritium. Physiologically the most susceptible potato variety was Bintje, then Resy, Jaerla, Desiree', Sirtema, while Saskia was the most resistant. The most resistant species was F. avenaceum and the least resistant F. solani. The most frequently found was F. sombucinum (41.7%). It is concluded that the dry rot of potato is becoming a more and more important disease in SR Slovenia with the expansion of mechanized production, storing and finishing in warehouses and with the import of seed potato (pathogenic fungus with the seed too).

The results show that the soil solution EC increased, whereas pH decreased with increasing salinity. The different salt levels also significantly delayed flowering and harvesting, depressed growth and yields, and generally increased the concentrations of nitrogen, phosphorus, sodium and chlorine, but decreased potassium concentration in the straw of both varieties. Varietal response to applied nitrogen, showed that in terms of straw yield, IR 52 responded more to the application of 90 kg N/ha whereas IR 26, to 135 kg N/ha application. Furthermore, fertilization with 90 and 135 kg N/ha increased the concentrations of nitrogen in the root and of potassium and sodium in the straw of IR 52. The same nitrogen levels increased the concentrations of phosphorus in the grain and of potassium in the straw of IR 26. The highest nitrogen rate (135 kg N/ha) increased chlorine concentration in the grain of IR 52, but decreased that of IR 26

Three combinations with equal grape stock (Berlandieri x x Riparia Kober 5BB) on which there were 3 different grape varieties (Red traminac, Merlot and Sauvignon) were used as objects of the investigation. On the other hand, the same grape variety (Red terminac) was applied to different stocks. A specific influence of the grape stock and of the grape variety on the concentration of ions was found. Variety had a much stronger influence on the N content in the leaves and shoots than the grape stock. Variety exerted a stronger influence on the P content in the leaves, while variety and stock had equal effects on the P content in the shoots. The grape stock exerted a stronger influence than variety on the K,Ca and Mg content in both examined plant organs, especially regarding the K content in the shoots. The content of the investigated ions in the plant material was the lowest when the nutrient solution lacked ions. The occurrence of the ion antagonism between N and K,Ca and P and Mg and P showed notably. Certain interaction was noticed among the nutrition variants, grape stocks and varieties, based on the contents in the leaves and shoots.